KR20000021622A - Output control device of audio signal in radio television - Google Patents

Abstract

PURPOSE: An output control device of audio signal in radio television is provided to use high quality sound in TV watching with prior function and compatibility. CONSTITUTION: An output control device of audio signal in radio television comprises a storage part(24), a comparing part(23), a selection output part(15), and a control part(21). The storage part stores respective channel data corresponding to respective broadcasting station. The comparing part comparing audio signals tuned and received from a radio tuner and a TV tuner. The selection output part selectively outputs only one audio signal among the radio and TV audio signals in accordance with a switching control signal. The control part provides the radio tuner with a tuning control signal, displays a message data on a monitor, and provide the selection output part with a selection switching signal.

Description

Audio signal output control device of compound TV

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite television (hereinafter, abbreviated as TV). In particular, in a composite TV comprising a radio and a TV set, a TV broadcast audio signal broadcasted through a currently selected TV channel, The present invention relates to an audio signal output control apparatus for a composite TV that allows a user to watch TV with a high-quality audio signal by selectively outputting an audio signal of a radio broadcast when the radio broadcast audio signal is the same broadcast program being broadcast on the same radio station.

In general, TV broadcasting receives a broadcasting program (video signal and audio signal) transmitted from a TV station through an antenna of a TV receiver, displays a video signal on a TV monitor by controlling the operation of a viewer, and outputs an audio signal corresponding to the speaker. It is a device to output through.

In addition, radio broadcasting is a system for receiving a broadcast program (audio signal) transmitted from a radio station through an antenna of a radio system and providing only an audio signal to a listener through a speaker.

Nowadays, due to the development of electronic and mechanical technology, a composite TV is developed and commercially available. That is, a composite TV with a TVCR and a radio system in which a TVCR and a VCR are mounted in one set is added to the TV set.

In addition, due to the development of electronic technology, the TV receiver can be easily adjusted by the consumer and fits the taste of the consumer, that is, the situation in which the TV receiver with various functions added by the consumers is widely used.

Here, a description will be given of a conventional composite TV in which a radio set is mounted in a TV set.

1 is a block diagram illustrating a block circuit configuration of a conventional TV (RADIO-TV). Referring to FIG. 1, a configuration of a TV broadcast signal received through an antenna ANT is selected by a user. A first tuner 10 tuned to the channel to match the channel, a first detector 11 for demodulating the audio and video broadcast signals tuned by the first tuner 10, and a first detector 11 The audio signal processor 16 for processing the demodulated audio signal to output the video signal, the video signal processor 12 for signal processing the demodulated video signal to enable image output, and the audio signal processed at a predetermined level. A second amplifying unit 17 for amplifying a signal, a first amplifying unit 12 for amplifying a signal processed video signal to a predetermined level, and an audio signal amplified by the first and second amplifying units 12 and 17, respectively. And a display unit 14 for reproducing the video signal, respectively. The audio output unit 18 is configured.

In addition, a second tuner 19 for tuning the radio broadcast signal to a frequency (channel) selected by the user, a second detector 20 for demodulating the radio broadcast audio signal tuned by the second tuner 19, and a radio; Tuning control of the first and second tuners 12 and 19 according to a key input unit 22 for providing a channel selection signal for selecting a broadcasting channel and a TV broadcasting channel, and a channel selection signal provided from the key input unit 22. A signal for providing a signal and selectively reproducing the TV broadcast audio signal and the radio broadcast audio signal which are demodulated and output by the first detector 11 and the second detector 20 to the audio output unit 18. The control unit 21 provides an output control signal.

In addition, the selection output unit 15 for selectively outputting the switched audio signal to the audio signal processing unit 16 by selectively switching the TV broadcasting audio signal or the radio broadcasting audio signal according to the audio signal selection output control signal provided from the control unit 21. ). The display unit 14 is a TV monitor, and the audio output unit 18 is a speaker.

Let's look at the operation of the audio signal output control device of a composite TV according to the prior art having such a configuration.

First, when a user selects a composite TV as a TV mode using the key input unit 22 and then selects a TV channel to be watched, the controller 21 is configured to tune the first tuner 10 to a channel selected by the user. To provide a tuning control signal. Accordingly, the first tuner 10 receives a TV broadcast signal (audio and video signal) through the tuned channel by tuning to a corresponding channel corresponding to the provided tuning control signal.

The received broadcast signal detects only pure audio and video signals by the first detector 11, and outputs the video signal to the video signal processor 12, and outputs the audio signal to the selective output unit 15. Here, since the user selects the TV mode, the selective output unit 15 switches the audio signal of the TV and outputs the audio signal to the audio signal processor 16.

The video signal processor 12 and the audio signal processor 16 signal-process the audio signal and the video signal of the TV broadcast program to be reproduced, respectively, and output the first and second amplifiers 12 and 17 to amplify a predetermined level. Then, the video signal and the audio signal are reproduced through the display unit 14 and the audio output unit 18, respectively.

In this way, when the video signal and the audio signal of a TV program in the TV mode are watching the audio signal broadcasted from the same radio station as the broadcast station broadcasted in the TV mode, for example, the current 9 o'clock news from the KBS1 station. If you are broadcasting a broadcast program, and the radio KBS1 station also broadcasts the 9 o'clock news on the TV at the same time, and wants to watch TV with an audio broadcast signal broadcast from a radio station, that is, a radio sound, first, a key input unit After selecting the radio channel of the same broadcasting station as the broadcasting station on the TV using the 22, and switching the audio reproduction mode to the radio mode, the control unit 21 provides a switching control signal to the selection output unit 15. do. Therefore, the selective output unit 15 switches the audio signal of the TV broadcast output from the first detector 11 to the radio broadcast audio signal output from the second detector 20 to the audio signal output unit 16. The output will be selective.

Accordingly, the display unit 14 displays a video signal of a TV broadcast program, and the speaker 18 outputs an audio broadcast signal broadcast from a radio station to watch TV with high quality sound.

When the same broadcast is performed on the same TV and radio station, the reason for watching TV with the audio broadcast signal provided by the radio station is that the frequency deviation of the audio signal of the TV is higher than the audio signal of the radio station. Because it is large. That is, the frequency shift of the broadcast audio signal of the TV is ± 25KHz, and the frequency shift of the audio signal of the radio broadcast is ± 75KHz. Here, the frequency shift means the maximum value of the instantaneous frequency and the carrier frequency of the modulated audio signal broadcast wave.

The apparatus for controlling audio signal output of a composite TV according to the prior art broadcasts a sound in a radio station when a broadcast program currently being broadcast on a TV station and a broadcast program broadcast on the same radio station as the TV station are the same broadcast program while watching TV. In order to listen to the sound, it is only possible if the user knows the fact that the program is being broadcasted, which programs are broadcasted simultaneously on TV and radio.

If the user knows when the same program is being broadcast on the same TV station and radio station, the user must select the radio sound by key operation and the radio frequency channel is the same radio station as the TV station. There is a cumbersome and complicated problem of selecting a channel as a channel.

Therefore, the present invention has been made to solve the above-mentioned problems according to the prior art, an object of the present invention is the same radio broadcasting station as the broadcasting station of the TV broadcasting channel currently being reproduced in a composite TV consisting of a radio and a TV set After auto-tuning the radio channel to the corresponding broadcasting channel, it is determined whether the audio signal being played by the TV station is the same audio signal as the audio signal being played by the same radio station. In the case of broadcasting a program, an audio signal received from a radio system is automatically output through a speaker, thereby providing an audio signal output control apparatus for a composite TV that enables a user to watch TV with a high quality audio signal.

1 is a view schematically showing a block circuit configuration of an audio signal output control apparatus of a composite TV according to the prior art.

2 is a block circuit diagram illustrating an audio signal output control apparatus of a composite TV according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

10, 19: tuner 11, 20: detector

12: video signal processor 13, 17: amplifier

14: display unit 15: selective output unit

16: audio signal processing unit 18: audio output unit

21 control unit 22 key input unit

23: comparison unit 24: storage unit

25: OSD processing unit

A feature of the audio signal output control apparatus of the composite TV according to the present invention for achieving the above object is in the composite TV system having a TV tuner, a radio tuner, a monitor, a speaker and a key input unit consisting of a plurality of keys, each TV A storage unit which stores each channel data of radio broadcasting corresponding to the name of the corresponding broadcasting station of the channel; A comparator for comparing whether audio broadcast signals of the same broadcast station tuned and received by the radio tuner and the TV tuner are the same audio broadcast signals; A selective output unit for selectively outputting to the speaker according to a switching signal provided with only one audio signal among the TV broadcast audio signal received through the channel tuned by the TV tuner and the audio signal tuned by the radio tuner; a) When one channel of the TV is selected through the key input unit, a tuning control signal for tuning the radio broadcast channel data of the channel data read out from the storage unit with the same radio broadcast channel data corresponding to the selected channel is tuned. And b) if the audio broadcasting signal tuned by the radio tuner and the TV tuner is the same as the comparison result, comparing the comparison unit with the radio tuner and outputting the audio data through the speaker. C) when the selection signal for selecting the radio sound is input through the key input unit, blocking the output of the TV broadcasting audio signal and selecting the switching control signal so that the radio broadcasting audio signal is reproduced through the speaker. It is configured to include a control unit provided to the output unit.

Hereinafter, a preferred embodiment of an audio signal output control apparatus of a composite TV according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a block circuit diagram of an audio signal output control apparatus of a composite TV according to the present invention. The same components as those of the prior art shown in FIG. 1 will be omitted, and the configuration of the present invention will be described. When a channel of the TV is selected using the storage unit 24 and the key input unit 22, the station 24 is added to and stored in each channel of the TV and the radio, and the radio station channel identical to the station name corresponding to the selected TV channel is selected. The control unit 21 which provides a tuning control signal to the second tuner 19 so that the same radio station channel as the selected TV broadcasting channel is tuned by the second tuner 19 so as to be tuned. A comparison unit 23 for comparing whether the audio signal received through the channel and the TV audio signal transmitted from the TV broadcasting station, that is, the same as the TV audio signal detected by the first detector 11 and the same signal, are compared with each other. When the comparison result of the unit 23 is the same audio signal, it is composed of an OSD processing unit 25 for displaying the OSD on the display unit 14 by OSD processing a message asking whether to select the radio sound according to the control signal of the control unit 21. .

In addition, if the comparison unit 23 determines that the audio signal is the same as the result of the comparison, that is, the same broadcast program, the OSD control signal OSD display unit so that the OSD message can be displayed. 25), and when a user inputs a selection key signal for viewing a OSD message displayed on the display unit 14 and selecting a radio sound, a switching control signal is provided to the selection output unit 15 to detect a second signal. The radio broadcast audio signal output from the unit 20 is switched to be output to the audio signal processor 16.

The operation of the audio signal output control apparatus of the composite TV according to the present invention having such a configuration will be described.

First, when power is supplied to the composite TV and one channel of the TV to be viewed through the key input unit 22 is selected, the controller 21 supplies a tuning control signal for tuning to the channel selected by the first tuner 10. to provide.

The first tuner 10 tunes to the selected channel according to the tuning control signal provided from the controller 21, and transmits the TV broadcast signal (video and audio signal) received through the tuned corresponding channel to the first detector 11. It can detect only video signal and audio signal of pure TV broadcasting.

At the same time, the control unit 21 reads the radio broadcasting channel data corresponding to the name of the corresponding broadcasting station of the selected TV channel from the storage unit 24. A tuning control signal is provided to the second tuner 19 such that the radio broadcasting channel is tuned according to the read radio broadcasting channel data, that is, the radio broadcasting channel data of the same broadcasting station corresponding to the selected TV broadcasting channel.

The second tuner 19 tunes to a radio broadcast channel of the same broadcast station corresponding to the TV broadcast channel according to the tuning control signal provided from the control unit 21 and outputs the audio broadcast signal received through the tuned radio channel to the second detector ( 20) to detect only pure radio broadcasting audio signals.

The audio signal of the TV broadcast and the audio signal of the radio broadcast thus detected are compared by the comparator 23 whether the audio signal has the same frequency, that is, the same broadcast signal. At this time, the broadcasting station corresponding to the TV channel and the broadcasting station corresponding to the radio channel are the same broadcasting station.

When the comparison result of the comparison unit 23, the control unit 21 determines that the audio broadcast signals are not the same as each other to output the TV broadcast audio signal detected by the first detector 11 to the selection output unit 15. The switching control signal is provided to reproduce the audio signal of the TV broadcast through the speaker 18.

On the contrary, if it is determined that the comparison unit 23 compares the audio broadcasting signals with the same, the OSD processing driving control signal is provided to the OSD processing unit 25. The OSD processing section 25 processes the message on whether to select a radio sound according to the provided driving control signal, and then displays a message on the display unit 14, for example, " (Y / N) " The message will be displayed.

When such a message is displayed on the display unit 14, the user inputs a key for selection through the key input unit 22. At this time, when a "Y" or a selection key for selecting a radio sound signal is input, the controller 21 provides a radio audio signal selection switching signal to the selection output unit 15 to switch the audio signal output from the second detector 20, that is, the radio broadcast audio signal, to be output to the audio signal processor 16. do. Accordingly, the audio signal processor 16 processes the radio broadcast audio signal to be reproduced, and finally outputs the radio broadcast audio signal to the speaker 18 through the second amplifying unit 17 to generate radio broadcast sound. To watch TV.

However, when the user does not select the radio broadcast audio signal based on the message displayed on the display unit 14, the controller 21 selects and outputs the TV broadcast audio signal output from the first detector 11. It is to provide a switching control signal to the selection output unit 15 so that. Since the subsequent operation is the same as described above, the description thereof will be omitted.

As a result, when one channel of the TV is selected, when an audio broadcast signal broadcast on the TV and an audio broadcast signal broadcast on the radio are tuned by selecting a radio station channel corresponding to the broadcast station of the selected channel (the same broadcast program). ) For example, if the broadcast program currently broadcasted by KBS1 TV station is 9 o'clock news, when the 9 o'clock news is broadcasted at the same time by KBS1 radio station at the same time, the audio signal that is broadcasted on the radio to the user, that is, sound Displays a message on the TV monitor 14 in OSD form and asks if the user wants to watch TV with radio sound, and blocks the output of the audio broadcasting signal of the TV and receives it from the radio system. One audio signal is output through the speaker 18 so that the TV can be watched with high quality sound. It will have to make. The reason why the radio broadcast audio signal is higher in quality than the audio signal of the TV is because the frequency shift is larger than the audio signal of the TV as mentioned in the prior art.

The audio signal output control apparatus for a composite TV according to the present invention as described above, when one channel of the TV is selected, the frequency of the audio signal of the broadcast program broadcast on the TV by selecting a radio station channel corresponding to the broadcast station of the selected channel After comparing whether the frequencies of the audio signals of the broadcast programs broadcasted from the same radio station are the audio signals of the same frequency, and if the audio signals having the same frequency to each other are judged to be the same broadcast program to be broadcast on the radio to the user Audio signal, that is, a message that asks if you want to watch TV with sound is displayed on the TV monitor in OSD form, and if the user wants to watch TV with radio sound after seeing the displayed message, the output of the audio broadcasting signal of the TV is blocked and Audio signal received from the By Output, which will be an advantage to watch TV in the high-quality sound with more vivid.

In addition, since it automatically compares and judges whether a program broadcasted on the same TV station and a radio station is broadcasted at the same time, the user does not need to know which broadcast program is broadcasted simultaneously at the same time. have.

In addition, since the message for the user to select the radio sound is displayed, there is an advantage that the compatibility with the conventional function.

Claims (2)

In a complex TV system having a TV tuner, a radio tuner, a monitor, a speaker, and a key input consisting of a plurality of keys, A storage unit for storing each channel data of radio broadcasting corresponding to a name of a corresponding broadcasting station of each TV channel; A comparator for comparing whether audio broadcast signals of the same broadcast station tuned and received by the radio tuner and the TV tuner are the same audio broadcast signals; A selective output unit for selectively outputting to the speaker according to a switching control signal provided with only one audio signal among the TV broadcast audio signal received through the channel tuned by the TV tuner and the audio signal tuned by the radio broadcast tuner; a) When a channel of the TV is selected through the key input unit, a tuning control signal for tuning the radio broadcast channel data of the channel data read from the storage unit with the same radio broadcast channel data corresponding to the selected channel is read from the storage unit. Provided by the radio tuner, b) if it is determined that the audio broadcasting signal received from the radio tuner and the TV tuner is the same as the comparison result, the OSD displays the message data indicating whether to output the radio audio broadcasting signal through the speaker and displays it on the monitor. , c) a control unit which, when the selection signal for selecting the radio sound is input through the key input unit, blocks the output of the TV broadcasting audio signal and provides a selection switching control signal to the selection output unit so that the radio broadcasting audio signal is reproduced through the speaker. Audio signal output control apparatus for a composite TV, characterized in that configured to include. The apparatus of claim 1, wherein the controller comprises an OSD processing unit configured to OSD process the message data to display the message in OSD form on the display unit.